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Saving Derived Attributes to Avoid Re-computation
Data that is derived from other data should be stored in the computed form to avoid re-computation. For this, we could define new classes and objects and these derived classes must be updated if any of the base objects is changed.
Explain how the associations are implemented as classes. A general approach in this case is to transform an association class into a simple class linked to two original classes
What does authentication refer? Authentication refers to the task of verifying the uniqueness of a person.
Draw an Entity-Relationship model for the relational schema given in the Appendix. Show all the entities, relationships, relationship names, and attributes and also underline the
cardnality ratio for humanresource mangement system
er diagtram for icici
Question 1 Discuss about second normal form and third normal form Question 2 Write short note on 1) Data Manipulation Language 2) Data Definition La
Define a property that is not a property of transactions? Ans: Concurrency is not a property of transactions
Submit the SQL Statements necessary to create your database according to the following guidelines: Your SQL statements should exactly mirror your ERD. All primary keys,
1. Define each of the following IN YOUR OWN WORDS: (a) File: (b) Record: (c) Field: (d) Primary Key: (e) Secondary Key: 2. A travel agency wants t
Scenario 1: Power goes out after the first instruction. What happens?
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